MIPS: Skip the mapcheck on the global object since the global proxy and cell are already checked (o…

src/ic/mips/handler-compiler-mips.cc

Index: src/ic/mips/handler-compiler-mips.cc
diff --git a/src/ic/mips/handler-compiler-mips.cc b/src/ic/mips/handler-compiler-mips.cc
index 93106ea0e15c8f0d6ac3f069c89938bed190d752..1f451e1bce3ce3ef50fb62294e3a78d3b6518ddb 100644
--- a/src/ic/mips/handler-compiler-mips.cc
+++ b/src/ic/mips/handler-compiler-mips.cc
@@ -452,11 +452,6 @@ Register PropertyHandlerCompiler::CheckPrototypes(
     } else {
       Register map_reg = scratch1;
       __ lw(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset));
-      if (depth != 1 || check == CHECK_ALL_MAPS) {
-        Handle<WeakCell> cell = Map::WeakCellForMap(current_map);
-        __ GetWeakValue(scratch2, cell);
-        __ Branch(miss, ne, scratch2, Operand(map_reg));
-      }
 
       // Check access rights to the global object.  This has to happen after
       // the map check so that we know that the object is actually a global
@@ -469,6 +464,10 @@ Register PropertyHandlerCompiler::CheckPrototypes(
       } else if (current_map->IsJSGlobalObjectMap()) {
         GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current),
                                   name, scratch2, miss);
+      } else if (depth != 1 || check == CHECK_ALL_MAPS) {
+        Handle<WeakCell> cell = Map::WeakCellForMap(current_map);
+        __ GetWeakValue(scratch2, cell);
+        __ Branch(miss, ne, scratch2, Operand(map_reg));
       }
 
       reg = holder_reg;  // From now on the object will be in holder_reg.
@@ -481,6 +480,8 @@ Register PropertyHandlerCompiler::CheckPrototypes(
     current_map = handle(current->map());
   }
 
+  DCHECK(!current_map->IsJSGlobalProxyMap());
+
   // Log the check depth.
   LOG(isolate(), IntEvent("check-maps-depth", depth + 1));